QUINCIE EN BEAUJOLAIS, France (Reuters) - The scrutiny Team Sky are facing may be the result of the British outfit's perceived arrogance, sports director Nicolas Portal said as the squad weather a "hurricane" in the shape of an anti-doping investigation.

Sky have been under fire since Britain's Department of Culture Media and Sport select committee and UK Anti-Doping started to investigate the delivery of a package to Bradley Wiggins at the Dauphine in 2011.

"I feel like the more we do, the more we try to lead by example, the more we are being criticized. Maybe we should not do it because we're being even more criticized."

In 2010, Sky raised a few eyebrows in the world of cycling when they said they wanted to produce a British Tour de France champion within five years.

They achieved their goal after three years when Wiggins prevailed in 2012.

"Maybe it was seen as arrogant and now we're paying for this," said Portal.

"There has always been suspicion around this team - motors in the bikes, riders sleeping in hypoxic chambers, organized doping.

"We're used to it but it's sure that in the long run, it's a heavy burden."

While Michal Kwiatkowski won the Strade Bianche classic last weekend and Geraint Thomas claimed the second stage of Tirreno Adriatico on Thursday, Sky have massively underperformed in the weeklong Italian race on Wednesday, finishing 18th in the opening time trial.

Asked why Sky were not a member of the Movement for Credible Cycling (MPCC), which sets tougher anti-doping rules than the World Anti-Doping Agency, Portal said: "I am convinced that we should have one set of anti-doping rules.

"Look at the MPCC - when teams are convicted of breaking the ban on corticoids, they don't pull their riders like they are supposed to. This movement is nothing."